Print head and activation system

Abstract

There is provided a print head discharging a liquid from a nozzle, including: a memory circuit that stores individual information of the print head and individual activation information based on the individual information; a communication control circuit that controls communication between the print head and an outside; a discharge control circuit that controls discharge of the liquid; and a limiting circuit that limits liquid discharge control by the discharge control circuit, in which when a signal according to the individual activation information is input from the outside, the limiting circuit changes a limitation of liquid discharge control by the discharge control circuit.

What is claimed is: 
     
       1. A print head discharging a liquid from a nozzle, comprising:
 a memory circuit that stores individual information of the print head and individual activation information based on the individual information; 
 a communication control circuit that controls communication between the print head and an outside; 
 a discharge control circuit that controls discharge of the liquid; and 
 a limiting circuit that limits liquid discharge control by the discharge control circuit, wherein 
 when a signal according to the individual activation information is input from the outside, the limiting circuit changes a limitation of liquid discharge control by the discharge control circuit, 
 the memory circuit stores discharge control information that is information for limiting liquid discharge control by the discharge control circuit, and 
 the discharge control information is rewritten when a signal according to the individual activation information is input from the outside. 
 
     
     
       2. The print head according to  claim 1 , wherein
 the individual information includes a production number of the print head. 
 
     
     
       3. The print head according to  claim 1 , wherein
 the individual information includes a serial number of the print head. 
 
     
     
       4. The print head according to  claim 1 , further comprising a drive element that is driven to cause the nozzle to discharge the liquid, wherein
 the individual information includes drive characteristics of the drive element. 
 
     
     
       5. The print head according to  claim 4 , wherein
 the drive characteristics include a maximum voltage value of a drive signal for driving the drive element. 
 
     
     
       6. An activation system comprising:
 a print head discharging a liquid from a nozzle; and 
 an individual activation information generation circuit, wherein 
 the print head has
 a memory circuit that stores individual information of the print head and individual activation information based on the individual information, 
 a communication control circuit that controls communication between the print head and an outside, 
 a discharge control circuit that controls discharge of the liquid, and 
 a limiting circuit that limits liquid discharge control by the discharge control circuit, 
 
 the individual activation information generation circuit is configured to communicate with the print head, and generates the individual activation information based on the individual information, and 
 when a signal according to the individual activation information is input from the outside, the limiting circuit changes a limitation of liquid discharge control by the discharge control circuit, 
 the memory circuit stores discharge control information that is information for limiting liquid discharge control by the discharge control circuit, and 
 the discharge control information is rewritten when a signal according to the individual activation information is input from the outside.